动画问题/画布切换问题
我正在开发一个程序，该程序应实质上使用户能够创建新画布，并能够通过单击下一个或上一个按钮在各种画布之间切换。按下此类按钮时，应立即出现动画。动画应复制翻书的页面。单击下一步时，页面应从右转到左，并显示下一个画布，反之亦然。我面临的问题是，当黑屏弹出并且没有切换时，我所拥有的程序无法正确显示动画，它应该显示当前页面以及下一页/上一页的某些屏幕。最重要的是，下一个和上一个按钮无法正确显示下一个或上一个画布。
package javaSwing;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.awt.geom.*;
import java.util.List;
import java.awt.geom.RectangularShape;
import javax.swing.JTextArea;
import java.awt.image.BufferedImage;
import java.awt.Graphics2D;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
public class guiInterface {
static int shapeChecker = 0;
static int currentCard = 0;
static int size = 0;
static JLabel status;
static ArrayList<ContentArea> canvasPages;
static JPanel cardPanel;
static Container contain;
static JMenuItem previous;
static JMenuItem delete;
static int numofCanvas = 0;
static JMenuItem next;
static JToggleButton color1;
static ContentArea page;
static Color newColor;
static ContentArea canvasArea;
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI() {
// create a new JFrame, which is a top-level window
JFrame frame = new JFrame("Canvas Painter");
cardPanel = new JPanel();
// $1 Gesture Recognizer
cardPanel.setPreferredSize(new Dimension(800, 600));
JScrollPane scrollPane = new JScrollPane((cardPanel), JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.getViewport().setPreferredSize(new Dimension(900, 700));
// cardLayout = new RXCardLayout();
// cardPanel.setLayout(cardLayout);
cardPanel.setLayout(new BorderLayout());
//cardPanel.add(new ContentArea(shapeChecker), BorderLayout.CENTER);
canvasPages = new ArrayList<>();
ContentArea initialContent = new ContentArea(shapeChecker);
canvasPages.add(initialContent);
cardPanel.add(initialContent, BorderLayout.CENTER);
canvasArea = canvasPages.get(numofCanvas);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// sets up a menu bar
JMenuBar menuBar = new JMenuBar();
frame.setJMenuBar(menuBar);
// setus up the file aspect of the menu bar
JMenu file = new JMenu("File");
menuBar.add(file);
// adds the items for the file aspect
JMenuItem newButton = new JMenuItem("New");
file.add(newButton);
delete = new JMenuItem("Delete");
file.add(delete);
JMenuItem quitButton = new JMenuItem("Quit");
file.add(quitButton);
// when clicked it will exit out of the program
quitButton.addActionListener(e -> System.exit(0));
// sets up the edit aspect of the menu bar
JMenu edit = new JMenu("Edit");
menuBar.add(edit);
// sets up the view aspect of the menu bar
JMenu view = new JMenu("View");
menuBar.add(view);
// adds the aspects to the view part of the program.
next = new JMenuItem("Next");
view.add(next);
previous = new JMenuItem("Previous");
view.add(previous);
// Left Hand Side tool pallette
// if possible add the toggle buttons to a group
JPanel buttons = new JPanel(new GridLayout(0, 1));
ButtonGroup group = new ButtonGroup();
JToggleButton select = new JToggleButton();
group.add(select);
JToggleButton line = new JToggleButton();
group.add(line);
JToggleButton rectangle = new JToggleButton();
group.add(rectangle);
JToggleButton oval = new JToggleButton();
group.add(oval);
JToggleButton pen = new JToggleButton();
group.add(pen);
JToggleButton text = new JToggleButton();
group.add(text);
// adds the button to a JPanel called buttons
buttons.add(select);
buttons.add(line);
buttons.add(rectangle);
buttons.add(oval);
buttons.add(pen);
buttons.add(text);
// main content area
// Container content = frame.getContentPane();
// content.setLayout(new BorderLayout());
// final ContentArea canvas = new ContentArea(shapeChecker);
// content.add(canvas, BorderLayout.CENTER);
// status bar
status = new JLabel();
status.setText(" Status Bar");
// This creates actions when each specific button is clicked.
newButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" New button has been clicked");
// Essentially create a new Content Area
// when new button is pressed each time
canvasPages.add(new ContentArea(shapeChecker));
numofCanvas = canvasPages.size() - 1;
cardPanel.add(canvasPages.get(numofCanvas), BorderLayout.CENTER);
}
});
// should add a new canvas
delete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
delGest();
}
});
// should delete the current tab
next.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
nextGest();
}
});
// should go to the next tab
previous.addActionListener(new ActionListener() {
// if the list gets to the beginning, disable button
public void actionPerformed(ActionEvent e) {
prevGest();
}
});
// should go to the previous tab
select.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Select button has been clicked");
shapeChecker = 0;
}
});
line.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Line button has been clicked");
shapeChecker = 1;
}
});
rectangle.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Rectangle button has been clicked");
shapeChecker = 2;
}
});
oval.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Ellipse button has been clicked");
shapeChecker = 3;
}
});
pen.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Pen button has been clicked");
shapeChecker = 4;
}
});
text.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
status.setText(" Text button has been clicked");
shapeChecker = 5;
}
});
// Extra Credit
// Color chooser
color1 = new JToggleButton();
color1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
chooseColor();
}
});
// this pretty much says that a color has been chosen
color1.addActionListener(e -> status.setText(" Color 1 Button has been clicked"));
// adds the color button to the group
// which is then added to the buttons JPanel
group.add(color1);
buttons.add(color1);
// creates a pannel of the buttons, and other things
JPanel left = new JPanel(new BorderLayout());
left.add(buttons, BorderLayout.NORTH);
frame.add(left, BorderLayout.WEST);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.add(status, BorderLayout.SOUTH);
frame.setSize(300, 300);
// pack() causes the size of the frame to be set just large enough to contain
// its
// children; setVisible(true) puts it on the screen
frame.revalidate();
frame.pack();
frame.setVisible(true);
}
public static void nextGest() {
status.setText(" Next Canvas");
if (numofCanvas != canvasPages.size() - 1) {
canvasArea.pageFlipping(canvasPages.get(numofCanvas + 1) , true, 25);
next.setEnabled(true);
} else {
next.setEnabled(false);
}
}
public static void prevGest() {
status.setText(" Previous Canvas");
if (numofCanvas > 0) {
canvasArea.pageFlipping(canvasPages.get(numofCanvas - 1) , false, 25);
}
}
public static void delGest() {
status.setText(" Deleting Canvas");
if (canvasPages.size() == 1) {
} else if (numofCanvas == 0) {
cardPanel.remove(canvasPages.get(numofCanvas));
canvasPages.remove(numofCanvas);
} else {
cardPanel.remove(canvasPages.get(numofCanvas));
canvasPages.remove(numofCanvas);
numofCanvas = -1;
}
}
public static void chooseColor() {
newColor = JColorChooser.showDialog(null, "Choose", color1.getBackground());
if (newColor != null) {
color1.setBackground(newColor);
}
}
}
// creates the content area and places it in the text area
class ContentArea extends JComponent {
int x = 0;
int y = 0;
int width = 0;
int height = 0;
int oldX = 0;
int oldY = 0;
int currentX = 0;
int currentY = 0;
int mpShapeX = 0;
int mpShapeY = 0;
int mpShapeX2 = 0;
int mpShapeY2 = 0;
Rectangle2D rect;
int prevX = 0;
int prevY = 0;
int directionDiffX = 0;
int directionDiffY = 0;
int threshold = 20;
int xDirection = 0;
int yDirection = 0;
int initialptX = 0;
int initialptY = 0;
Timer timer;
BufferedImage offScreenImage;
int flipPageX = 0;
int iterations = 0;
int flipPageY = 0;
boolean flag = false;
boolean forwards = false;
double dx;
double dy;
Point startPoint;
Point prevPoint;
ArrayList<Shape> variousShapes = new ArrayList<Shape>();
ArrayList<Shape> shapestoDel = new ArrayList<Shape>();
Shape theShape;
Shape shapetoDrag;
Shape clearer;
boolean selected = false;
boolean clear = false;
boolean dragging = false;
boolean goingNorth = false;
boolean goingSouth = false;
boolean goingEast = false;
boolean goingWest = false;
boolean snappedN = false;
boolean snappedS = false;
boolean snapped = false;
boolean snappedE = false;
boolean snappedW = false;
boolean resizable = true;
private int pos = -1;
ArrayList<Point2D> points = null;
ContentArea area;
private Point2D.Double offset;
public ContentArea(int shapeChecker) {
int shapeNum = shapeChecker;
// setDoubleBuffered(false);
addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e)) {
// search through arraylist that finds a shape that contains the mouse
// if found then selected variable will be true
// save shape into a variable
oldX = e.getX();
oldY = e.getY();
initialptX = e.getX();
initialptY = e.getY();
currentX = oldX;
currentY = oldY;
Point p = e.getPoint();
startPoint = new Point(e.getX(), e.getY());
if (guiInterface.shapeChecker == 0) {
for (Shape mpShapes : variousShapes) {
if (mpShapes.contains(startPoint)) {
if (mpShapes instanceof Rectangle2D || mpShapes instanceof Ellipse2D
|| mpShapes instanceof Line2D) {
selected = true;
shapetoDrag = mpShapes;
offset = new Point2D.Double(oldX - shapetoDrag.getBounds2D().getX(),
oldY - shapetoDrag.getBounds2D().getY());
}
}
}
}
} else {
points = new ArrayList<Point2D>();
// translate to canvas coordinate system
Point p = e.getPoint();
points.add(p);
if (e.getX() < 10) {
if (guiInterface.numofCanvas > 0) {
flag = true;
forwards = false;
offScreenImage = ImageRender.makeOffscreenImage(guiInterface.canvasPages.get(guiInterface.numofCanvas - 1));
flipPageX = e.getX();
}
} else if (e.getX() > guiInterface.cardPanel.getWidth() - 10) {
if (guiInterface.numofCanvas != guiInterface.canvasPages.size() - 1) {
flag = true;
forwards = true;
offScreenImage = ImageRender.makeOffscreenImage(guiInterface.canvasPages.get(guiInterface.numofCanvas - 1));
}
} else {
}
}
repaint();
}
public void mouseReleased(MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e)) {
} else {
if (flag) {
if (forwards) {
if (e.getX() > guiInterface.cardPanel.getWidth() / 2) {
pageflipStops(e.getX());
} else if (e.getX() < guiInterface.cardPanel.getWidth() / 2 && e.getX() > 40) {
animationComplete(e.getX());
} else {
flag = false;
repaint();
revalidate();
guiInterface.numofCanvas += 1;
}
} else {
if (e.getX() < guiInterface.cardPanel.getWidth() / 2) {
pageflipStops(e.getX());
} else if (e.getX() > guiInterface.cardPanel.getWidth() / 2 && e.getX() < guiInterface.cardPanel.getWidth() - 40) {
animationComplete(e.getX());
} else {
flag = false;
repaint();
revalidate();
guiInterface.numofCanvas -= 1;
}
}
}
repaint();
}
if (theShape != null) {
variousShapes.add(theShape);
}
}
});
addMouseMotionListener(new MouseMotionAdapter() {
public void mouseDragged(MouseEvent e) {
// check if selected shape, if so, then adjust the shapes
// location and repaint.
if (SwingUtilities.isLeftMouseButton(e)) {
// in this case, the drawing points should be recognized
if (guiInterface.shapeChecker == 4) {
selected = false;
oldX = e.getX();
oldY = e.getY();
repaint();
}
} else {
Point p = e.getPoint();
points.add(p);
repaint();
}
}
});
}
public void pageFlipping(ContentArea change, boolean forwards, int n) {
offScreenImage = ImageRender.makeOffscreenImage(change);
flag = true;
this.forwards = forwards;
timer = new Timer(75, new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if (iterations < n) {
if (forwards) {
flipPageX = change.getWidth() - (iterations + 1) * (change.getWidth()) / n;
} else {
flipPageX = (iterations) * (change.getWidth() / n);
}
flipPageY = 0;
repaint();
revalidate();
iterations++;
} else {
timer.stop();
flag = false;
iterations = 0;
repaint();
revalidate();
if (forwards) {
guiInterface.numofCanvas += 1;
} else {
guiInterface.numofCanvas -= 1;
}
// Display the next or previous page after the last iteration
// Should go to the next page
//
}
}
});
timer.start();
}
public void pageflipStops(int a) {
iterations = 0;
int goingforward = offScreenImage.getWidth() - a;
timer = new Timer(75, new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if (iterations < 10) {
if (forwards) {
flipPageX = a - (iterations + 1) * (a / 12);
} else {
flipPageX = a + (iterations) * (goingforward / 12);
}
repaint();
revalidate();
iterations++;
} else {
timer.stop();
flag = false;
iterations = 0;
repaint();
revalidate();
}
}
});
timer.start();
}
public void animationComplete(int a) {
iterations = 0;
int goingforward = offScreenImage.getWidth() - a;
timer = new Timer(75, new ActionListener() {
public void actionPerformed(ActionEvent ev) {
if (iterations < 12) {
if (forwards) {
flipPageX = a - (iterations + 1) * (12 / 10);
} else {
flipPageX = a + (iterations) * (goingforward / 12);
}
repaint();
revalidate();
iterations++;
} else {
timer.stop();
flag = false;
iterations = 0;
repaint();
revalidate();
}
if (forwards) {
guiInterface.nextGest();
} else {
guiInterface.prevGest();
}
}
});
timer.start();
}
public void paintComponent(Graphics g) {
if (dragging) {
Graphics2D g2d = (Graphics2D) g.create();
Stroke dashed = new BasicStroke(3, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL, 0, new float[] { 9 }, 0);
g2d.setStroke(dashed);
g2d.setColor(Color.GRAY);
for (int x = 100; x < getWidth(); x += 100)
g2d.drawLine(x, 0, x, getHeight());
for (int y = 100; y < getHeight(); y += 100)
g2d.drawLine(0, y, getWidth(), y);
}
Graphics2D graphics1 = (Graphics2D) g;
Graphics2D graphics2 = (Graphics2D) g;
Graphics2D graphics3 = (Graphics2D) g;
ArrayList<Point2D> points = getPoints();
super.paintComponent(g);
graphics1.setStroke(new BasicStroke(4));
graphics1.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics1.setColor(guiInterface.newColor);
for (Shape s : variousShapes) {
graphics1.draw(s);
}
// gesture line
if (points != null) {
for (int i = 0; i < points.size() - 1; i++) {
Point2D p1 = points.get(i);
Point2D p2 = points.get(i + 1);
graphics2.setStroke(new BasicStroke(3));
graphics2.setPaint(Color.red);
graphics2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics1.drawLine((int) p1.getX(), (int) p1.getY(), (int) p2.getX(), (int) p2.getY());
}
}
// check to see if page is flipping
// if so it draws it
if (flag) {
if (forwards) {
BufferedImage portion = offScreenImage.getSubimage(flipPageX, flipPageY, this.getWidth() - flipPageX,
this.getHeight());
graphics3.drawImage(portion, flipPageX, flipPageY, this);
} else {
BufferedImage portion = offScreenImage.getSubimage(0, 0, flipPageX,
this.getHeight());
graphics3.drawImage(portion, 0, 0, this);
}
graphics3.drawRoundRect(flipPageX, flipPageY, 30, this.getHeight(), 5, 5);
graphics3.setColor(new Color(250, 242, 173));
graphics3.fillRoundRect(flipPageX, flipPageY, 30, this.getHeight(), 5, 5);
graphics3.setColor(Color.BLACK);
}
repaint();
}
public void paintChildren(Graphics g) {
//Only allow the current page to be visible in "normal" mode
super.paintChildren(g);
int index = 0;
for (Component comp: guiInterface.canvasPages) {
if (index != guiInterface.numofCanvas) {
comp.setVisible(false);
} else {
comp.setVisible(true);
}
index++;
}
}
public ArrayList<Point2D> getPoints() {
return points;
}
private void updateStatus(Result r) {
if (r == null) {
guiInterface.status.setText("null result");
} else if (r.getName().equals("No match")) {
guiInterface.status.setText("No match");
} else {
Rectangle rect = r.getBoundingBox();
guiInterface.status.setText(r.getName() + " (score=" + r.getScore() + ") " + " bbox: x=" + rect.getX()
+ " y=" + rect.getY() + " w=" + rect.getWidth() + " h=" + rect.getHeight());
}
}
}
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